Is this wide receiver class not nearly as good as advertised? Is Tyrone Tracy a legit sleeper at running back? Will Stefon Diggs finish as a top-15 wideout this year? JJ answers those questions -- and more -- on this week's mailbag episode.   Sign up on Underdog now and use promo code LATEROUND for a deposit match up to $100: https://play.underdogfantasy.com/p-late-round-ff   Purchase the Late-Round Prospect Guide: http://www.lateround.com/